trouble loopback mounting initrd.img -pls help

metagroboliser · 04-23-2006, 06:14 AM

I'm unable to loopback mount the FC5 ramdisk image (initrd-2.6.16-1.2080_FC5.img) ... mount doesn't appear to recognise the filesystem type. I'm doing the following:

Code:

> cp /boot/initrd-2.6.16-1.2080_FC5.img /tmp/initrd.img.gz
> gunzip /tmp/initrd.img.gz  # creates /tmp/initrd.img
> mount -o loop /tmp/initrd.img /mnt

mount complains about the filesystem type. Speciying -t ext2/3/vfat/msdos yields the same complaint ... filesystem not recognised.

Whats the fstype for the ramdisk image? Is there something obvious I'm missing.

cheers.

ilikejam · 04-23-2006, 07:19 AM

Hi.

initrd images are actually cpio archives.

Try

Code:

cpio -i -I /tmp/initrd.img

Dave

homey · 04-23-2006, 07:20 AM

Quote:

Is there something obvious I'm missing.

It's not obvious and I had to google for abit before finding out to use cpio.
Here are my notes where I have the initrd.img in /home/isolinux

Code:

EXTRACT and EDIT INITRD.IMG (The Linux Filesystem)

# unpack the current initrd.img
mkdir /home/cdimgextract
cd /home/cdimgextract
gzip -dc < /home/isolinux/initrd.img | cpio -i
cd /home
# make any changes you need to the initrd.img in cdimgextract


REMAKE MODIFIED INITRD.IMG

cd /home/cdimgextract
# create the new initrd
rm -f /home/isolinux/initrd.img
find . | cpio -o -c | gzip -9 > /home/isolinux/initrd.img
# cleanup
cd /home
rm -rf cdimgextract

metagroboliser · 04-23-2006, 07:15 PM

got it ... muchthanx.